diff --git a/sys/cam/scsi/scsi_da.c b/sys/cam/scsi/scsi_da.c
index 8e74fe9e7176..617afbdeedcb 100644
--- a/sys/cam/scsi/scsi_da.c
+++ b/sys/cam/scsi/scsi_da.c
@@ -2820,6 +2820,7 @@ cmd6workaround(union ccb *ccb)
 			xpt_print(ccb->ccb_h.path,
 			    "SYNCHRONIZE CACHE(10) not supported.\n");
 		softc->quirks |= DA_Q_NO_SYNC_CACHE;
+		softc->disk->d_flags &= ~DISKFLAG_CANFLUSHCACHE;
 		return (0);
 	}